Cypress Semiconductor Corp CYD18S72V18-167BGXC

Overview

CYD18S72V18-167BGXC from Cypress Semiconductor is a 18-Mbit (256 K × 72) synchronous true dual-port SRAM with independent 72-bit SDR interfaces per port, 200 MHz clock support, deterministic collision arbitration, and 1.8 V core/IO operation. It enables simultaneous read/write access from two independent bus domains in high-throughput networking and packet buffering applications.

For engineers reviewing the CYD18S72V18-167BGXC datasheet, CYD18S72V18-167BGXC pinout, CYD18S72V18-167BGXC application, or CYD18S72V18-167BGXC equivalent, key selection criteria include 72-bit dual-port bandwidth, pipelined vs. flow-through latency mode, JTAG boundary scan compliance, VIM impedance tuning, and mailbox-interrupt message passing capability.

Technical Context

This device implements a synchronous dual-port architecture with two fully independent 72-bit data buses, each supporting single-data-rate operation up to 200 MHz. Each port features configurable pipelined (2-cycle) or flow-through (1-cycle) read latency, selectable I/O standards (1.8 V LVCMOS, 2.5 V LVCMOS, Extended HSTL), and dedicated burst counters for sequential addressing.

Deterministic access control resolves address collisions via flag signaling and first-busy-address readback on back-to-back cycles. Advanced features include variable impedance matching (VIM), echo clocks for timing margin improvement, mailbox registers with interrupt flags, and IEEE 1149.1 JTAG boundary scan for testability.

Key Specifications

Pinout & Package

Package: 484-ball plastic ball grid array (PBGA), 19 mm × 19 mm, 1.0 mm ball pitch, RoHS-compliant. Designed for high-density PCB layouts with controlled impedance routing and thermal dissipation via center ground/power balls.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous dual-port SRAM applications.

Compared with CYD18S36V18-167BGC, the CYD18S72V18-167BGXC delivers double data width and higher bandwidth at the cost of larger package and pin count; versus IS61WV102418BLL-10TLI, it provides synchronous determinism, JTAG testability, and hardware messaging - essential for telecom and networking infrastructure.

Availability

CYD18S72V18-167BGXC is available at Aetrix Electronics and suitable for packet buffering, network processor interfacing, telecom line card buffering, and industrial real-time control requiring stable component supply across extended product lifecycles.

Supply support for CYD18S72V18-167BGXC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) designs high-performance memory and programmable solutions for communications, industrial, and automotive markets.

The FullFlex™ SDR Dual Port SRAM product line targets high-speed deterministic data exchange in networking, telecom, and real-time embedded systems - emphasizing synchronous bandwidth, collision predictability, and flexible I/O integration.

FAQ

What is the maximum supported clock frequency for each port?

The CYD18S72V18-167BGXC supports up to 200 MHz on both left and right ports simultaneously, delivering 28.8 Gb/s aggregate bandwidth. This rating is validated across commercial temperature range (0°C to +70°C) with 1.8 V core and I/O supplies, and requires adherence to AC timing parameters including tCK (5 ns min), tDS (1.5 ns min), and tDH (1.5 ns min) as specified in Rev. *J datasheet Section 26.

Does this device support JTAG boundary scan testing?

Yes, the CYD18S72V18-167BGXC implements full IEEE 1149.1 JTAG boundary scan functionality with TDI, TDO, TMS, TCK, and TRST pins. The scan chain covers all I/O buffers and internal logic blocks, enabling board-level interconnect testing and in-system programming verification without requiring external test fixtures.

How does deterministic collision arbitration work in practice?

When both ports access the same memory location on the same clock edge, the device asserts BUSYL/BUSYR flags and outputs the conflicting address on the address bus within one cycle. The deterministic flag (e.g., CNTINTL/CNTINTR) indicates which port wins based on fixed priority logic - no random arbitration or retry delays - ensuring bounded worst-case latency for time-critical applications.

Can the I/O voltage standard be configured independently per port?

Yes, each port supports independent selection among 1.8 V LVCMOS, 2.5 V LVCMOS, or Extended HSTL (1.4–1.9 V) via CONFIG block settings. This is implemented through dedicated VTTL pins and internal voltage reference circuitry (VREFL/VREFR), allowing direct interface to mixed-voltage FPGA banks or ASIC subsystems without external level shifters.